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Heat Transfer Research
Импакт фактор: 0.404 5-летний Импакт фактор: 0.8 SJR: 0.264 SNIP: 0.504 CiteScore™: 0.88

ISSN Печать: 1064-2285
ISSN Онлайн: 2162-6561

Выпуски:
Том 51, 2020 Том 50, 2019 Том 49, 2018 Том 48, 2017 Том 47, 2016 Том 46, 2015 Том 45, 2014 Том 44, 2013 Том 43, 2012 Том 42, 2011 Том 41, 2010 Том 40, 2009 Том 39, 2008 Том 38, 2007 Том 37, 2006 Том 36, 2005 Том 35, 2004 Том 34, 2003 Том 33, 2002 Том 32, 2001 Том 31, 2000 Том 30, 1999 Том 29, 1998 Том 28, 1997

Heat Transfer Research

DOI: 10.1615/HeatTransRes.2012004486
pages 139-150

WATER VAPOR TRANSPORT WITH CONDENSATION IN A GAS DIFFUSION LAYER OF A PROTON EXCHANGE MEMBRANE FUEL CELL

Zetao Tan
Institute of Thermal Energy Engineering, School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, China
Li Jia
Institute of Thermal Engineering, School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, China; Beijing Key Laboratory of Flow and Heat Transfer of Phase Changing in Micro and Small Scale, Beijing 100044, China
Zhuqian Zhang
Institute of Thermal Energy Engineering, School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, China

Краткое описание

Water management plays a crucial role in a proton exchange membrane fuel cell. Experimental investigation of water transport in a gas diffusion layer (GDL) promotes the understanding to transport mechanism in it. Also it is helpful to model constructing. In this study, an ex situ setup is built to investigate water vapor transport process with heat transfer. Gas permeability and vapor condensation amount are measured. It is observed that water vapor condenses and breakthrough the sample when water vapor flows through GDL with temperature gradients between the two sides. The breakthrough phenomenon is different from that of liquid water. According to water vapor condensing mass measurement, the roles of polytetrafluoroethylene (PTFE) loading of GDL and micro-porous layer (MPL) are analyzed based on the experiments on various samples. The results show that the presence of PTFE causes the condensing amount of vapor decreasing. In addition, adding MPL to one side of gas diffusion substrate (GDS) facilitates water transport in the vapor phase. MPL is beneficial to water removal from GDL.